With a hyaluronic acid serum, the way you apply it shapes the result as much as the product itself: whether the skin is damp at that moment and what goes on top of the serum. The steps below are based on the formula data and the directions for use of Hydra Back Baby.
In short: Apply 3–4 drops of hyaluronic acid serum to cleansed skin that has been patted dry with a towel and is still slightly damp; follow with moisturiser, and finish the morning routine with sunscreen. Hydra Back Baby contains 2% 8D hyaluronic acid and 1.2% Pentavitin; it is used morning and evening and needs no gradual start. On acid toner evenings it goes on after the toner, and on Red Of Love evenings after rinsing.
Should you apply hyaluronic acid serum to damp skin?
Yes; applying it to slightly damp skin is recommended. Hyaluronic acid is a humectant: according to a review of the skin barrier, humectants draw water from the lower layer of the skin into the upper layer, while occlusives cover the surface and limit the loss of this moisture. We explain how humectant, emollient and occlusive ingredients share the work in a routine in our article serum or cream.
The American Academy of Dermatology (AAD) also recommends applying moisturiser while the skin is still damp and lists hyaluronic acid among the ingredients to look for in dry skin. In practice, this means applying the serum without drying your face completely and putting moisturiser on top without waiting.
How to use a hyaluronic acid serum: step by step
- Cleanse and pat dry. Press the towel against your skin rather than rubbing; leave the skin slightly damp.
- If you use a toner, apply it first. After a toner, the skin is already slightly damp.
- 3–4 drops are enough. Spread the serum over the face and press it in with your palms; avoid contact with the eyes.
- Seal with moisturiser. The cream that follows the serum is the step that helps keep in the water drawn in by the humectant.
- Apply sunscreen in the morning. It is the last step of the morning routine; hyaluronic acid does not provide sun protection.
Why does Hydra Back Baby combine two humectants?
Hydra Back Baby Hydrating Serum targets hydration with two different humectants: 2% 8D hyaluronic acid is a blend of eight forms of hyaluronic acid (why the forms are separated is explained in our hyaluronic acid guide), while 1.2% Pentavitin (saccharide isomerate) is a second, sugar-derived humectant. An expert panel assessment that includes Pentavitin reports that these sugar derivatives function as humectants in cosmetics and were found safe under current conditions of use.
| Feature | Hydra Back Baby |
|---|---|
| Key actives | 2% 8D hyaluronic acid, 1.2% Pentavitin |
| How it appears on the label | The 8D forms, each under its own INCI name, in the last part of the list (for example Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid); Pentavitin as “Saccharide Isomerate” |
| Supporting ingredients | Panthenol, Acacia senegal |
| When | Morning and evening, after toner, before moisturiser |
| Skin type | All skin types; sensitive, dry and normal on the label |
How Pentavitin differs from hyaluronic acid is explained in our Pentavitin (saccharide isomerate) guide.
Can you use hyaluronic acid serum every day?
Yes; Hydra Back Baby can be used morning and evening. Because its main ingredients are humectants rather than exfoliants, there is no rule of starting a few times a week and building up, as there is with acid products. Before first use, do a patch test on the inner forearm. Having “acid” in the name of hyaluronic acid does not indicate exfoliation: this ingredient is a glycosaminoglycan that is also found in human tissues.
The product that goes on top of the serum is chosen according to skin type. For dry skin, the AAD recommends a cream or ointment texture rather than a lotion; oily and combination skin can complete the same step with a lightweight, water-based moisturiser. Cream and sunscreen options for this step can be found in our moisturisers collection.
If Any Time Of Day contains hyaluronic acid, do you still need a serum?
Not always. Any Time Of Day Water-Based Moisturising Cream also contains 2% 8D hyaluronic acid, along with 5% niacinamide, and it contains no silicones; if your skin feels comfortable, it can take on the hydration step on its own. Using the two products together makes sense in these cases:
- If your skin feels dry and tight: Hydra Back Baby builds the hydration layer first, and Any Time Of Day completes it.
- On acid toner or peel evenings: after the active step, two layers of hydration support the skin's comfort.
Where does hyaluronic acid serum go in a routine with actives?
Hydra Back Baby goes after the active step and before moisturiser. Its place alongside the active products in the range is as follows:
| Routine | Where Hydra Back Baby goes | Note |
|---|---|---|
| Glyc-Alright or Slyc-Alright evening | After the leave-on toner | No other exfoliant that evening |
| Red Of Love evening (no more than 2 a week) | After the peel has been rinsed off and the face patted dry | Then moisturiser |
| Glow Me Like You Do morning | After the vitamin C derivative serum has absorbed | Moisturiser and sunscreen |
| Love In Blue This Time evening | Before Love In Blue This Time | Kept separate from acid evenings |
Love In Blue This Time Ceramide and Copper Peptide Serum is not used on the same evening as toners and peels containing AHA or BHA. This is why Hydra Back Baby takes on the hydration step on acid evenings, while the barrier serum is kept for evenings without exfoliating acids.
What does Hydra Back Baby not do, and who should take care?
- It does not replace a moisturiser. Humectants attract water; a moisturiser is needed on top to keep this moisture in.
- It does not fill deep lines. The plumper look it gives relates to the skin's hydration level.
- It does not clear away dead cells or protect the skin from the sun.
- It does not address the cause of persistent dryness. According to the AAD, dryness that continues despite these recommendations may be linked to an underlying health condition; see your doctor for skin that flakes, itches or cracks.
- Irritated skin: do not apply to broken or irritated skin; if sensitivity develops, take a break from using it.
Frequently asked questions
Can Hydra Back Baby be used on a peel evening?
Yes. Red Of Love is rinsed off with plenty of water after 5–10 minutes; after patting your face dry, apply Hydra Back Baby and then moisturiser. Red Of Love contains AHAs. AHAs can increase the skin's sensitivity to the sun: apply sunscreen every morning while using this product and for one week after you stop.
Can hyaluronic acid serum be used with niacinamide?
Yes. It can sit in the same routine as a serum containing niacinamide or a toner with niacinamide such as Glyc-Alright; moisturiser follows both. If redness occurs, add new products one at a time to find the source.
Can hyaluronic acid serum be applied under make-up?
Yes. Once the serum has absorbed, apply moisturiser and sunscreen, and put on make-up last.
Can Hydra Back Baby be used during pregnancy?
The main ingredients of Hydra Back Baby are humectants such as hyaluronic acid and Pentavitin; its supporting ingredients are panthenol and Acacia senegal. If you are pregnant or breastfeeding, or have a skin condition, consult your doctor before use. Take the product's ingredient list to the appointment.
Sources
- Rajkumar J et al. The Skin Barrier and Moisturization: Function, Disruption, and Mechanisms of Repair. Skin Pharmacol Physiol. 2023.
- American Academy of Dermatology (AAD). Dermatologists’ top tips for relieving dry skin.
- Johnson W Jr et al. Safety Assessment of Anhydrogalactose, Anhydroglucitol, Anhydroxylitol, Arabinose, Psicose, Saccharide Hydrolysate, and Saccharide Isomerate as Used in Cosmetics. Int J Toxicol. 2025.
- Juncan AM et al. Advantages of Hyaluronic Acid and Its Combination with Other Bioactive Ingredients in Cosmeceuticals. Molecules. 2021.
This content is for information only and does not replace medical advice. s'hevec products are cosmetic products and are not intended for medical treatment. It was prepared by the s'hevec Team on the basis of the s'hevec product data library and the sources listed above.
